- Dadashi, N. and Khajehpour, M., 2004. The effects of Planting Date and Cultivar on growth, yield and its components in safflower in Isfahan. Journal of Science and Technology of Agriculture and Natural Resources, 8(3): 95-111.

- Marinova, D., Ribarova, F. and Atanassova, M., 2005. Total phenolic and total flavonoids in Bulgarian fruits and vegetables. Journal of the University of Chemical Technology and Metallurgy, 40(3): 255-260.